PICTURE WINDOWS

Picture windows, also known as fixed windows, are there for two main reasons – light and view. These windows do not open, do not have any screens and no moving parts. They are just their to deliver the most amount of daylight into your house and to provide you with the most amount of view.

It is also possible to make picture windows in just about any shape and size. This way you can enhance the look of you home and personalize it.

Picture Windows Double Pane 4mm Glass Double Pane 4mm Glass Triple Pane 3mm Glass
Glass 1 coating Low-E 180 Low-E 272 Low-E 180
Glass 2 coating Clear Clear Clear
Glass 3 coating Low-E 180
Gas Filled Argon Argon Argon
U-factor metric 1.55 1.48 1.02
U-factor Imperial 0.27 0.26 0.18
R-Value 3.66 3.84 5.57
Solar Heat Gain 0.58 0.43 0.48
Air Leakage 0.0045 0.0045 0.0045
ER ratings 40 32 45

Features

  • Most efficient and least expensive
  • Wide variety of shapes and sizes
  • Come with narrow and thick frame to match the other windows
  • Ideal choice for large openings

U-FACTOR CONVERSION TO R-VALUE

Windows, skylights and doors are not generally assigned with an R-value when they are being tested. Nevertheless, window salespeople and contractors may often refer to an R-value for measuring the window performance.

R-value serves as a measure of the resistance to flow of heat. In order to understand this R-value system in a better way, you can sample U-factors in metric as well as imperial units that have been perfectly converted to the R-values in this following table.

Since the ER values are actually derived from a mathematical formula that makes use of U-factor as well as solar heat gain, there’s no method for directly converting the ER value into an R-value.

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